feat: add phone frequency controls and modularize codebase

src/api/admin/files.api.ts

@@ -0,0 +1,38 @@
+import { request, requestBlob, requestForm, withQuery } from '../core/httpClient';
+import type { FileObject } from '../types';
+import { assertUploadFileSize } from '@/utils/fileUpload';
+import { clearSession, dispatchSessionEvent, hasRecentUserActivity, readSession, redirectToPortalLogin } from '../session';
+import { readErrorBody } from '../core/httpClient';
+
+export const adminFilesApi = {
+  uploadFileObject: async (file: File, body: { purpose: string; prefix?: string }, tenantId?: string) => {
+    assertUploadFileSize(file);
+    const form = new FormData();
+    form.set('file', file);
+    form.set('purpose', body.purpose);
+    if (body.prefix) {
+      form.set('prefix', body.prefix);
+    }
+    const headers = new Headers();
+    const session = readSession('admin');
+    if (session && hasRecentUserActivity()) headers.set('x-session-activity', 'user');
+    if (tenantId) {
+      headers.set('x-tenant-id', tenantId);
+    }
+    const response = await fetch('/api/admin/files/upload', { method: 'POST', headers, body: form, credentials: 'same-origin' });
+    if (response.status === 401 && session) {
+      const error = await readErrorBody(response.clone());
+      if (error.code === 'SESSION_LOCKED') {
+        dispatchSessionEvent('admin', 'locked', { message: error.message });
+      } else {
+        clearSession('admin');
+        dispatchSessionEvent('admin', 'logout', { code: error.code, message: error.message });
+        redirectToPortalLogin('admin');
+      }
+    }
+    if (!response.ok) {
+      throw new Error(await response.text());
+    }
+    return response.json() as Promise<FileObject>;
+  },
+};